A Planted Technology seat bracket for the Ford Mustang, 1974 to 1978. Part number SB170.
The Mustang II. 1979 to 1998 takes SB010 and 2005 to 2014 takes SB039.
The one nobody defends, and the one hot rodders quietly rely on
The Mustang II is built on Pinto underpinnings and arrived at the worst possible moment, and it has been the punchline of Mustang history ever since.
What is less often said is that its front suspension crossmember became the standard independent front end swap for American hot rods for decades. More Mustang IIs have been broken for that part than kept whole, which is precisely why complete survivors are now scarce.
Which changes the calculation
If you have a complete one, it is worth more than the reputation suggests and worth keeping original. The bracket picks up the factory mounting points so nothing is cut.
Practical
These rust and were built to a price. Get the carpet up and look before you spend.
A period trimmed shell suits the car. Handed, so order twice for a pair.
Have you written anything about this exact product?
Yes, we have covered this exact product: Lexus Planted Technology Frames Updated For 2026, and The perfect Cobra retro seats for your Ford Mustang!. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is made for the Ford Mustang (1974-1978). Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
Check the bolt pattern in the specification against your seat. The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Planted frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.